Hemorheology examination is mainly to study the fluidity and viscosity of blood, as well as the aggregation and deformation of red blood cells and platelets in blood. The examination can predict diseases, such as arteriosclerosis, hypertension, coronary heart disease, angina pectoris, myocardial infarction, diabetes, cerebrovascular and other diseases. In clinical practice, blood viscosity analyzer is commonly used for this examination. Blood viscosity analyzer is a special detection instrument that judges the condition by detecting the blood viscosity of human body. The automatic blood viscosity analyzer is composed of sample disk, blood sampling needle, test tube, peristaltic pump, motor and other structures. The blood viscosity analyzer needs the help of the peristaltic pump when mixing the blood sample.
After the blood sample is initially collected by the blood viscosity analyzer, the key step of mixing the blood sample is entered. This step aims to mix the precipitated blood cells with the plasma, which can ensure the accuracy of the whole blood viscosity detection.
The circuit controls the sampling probe connected with the peristaltic pump. Under the action of the peristaltic pump, after absorbing a certain amount of whole blood sample, the circuit controls the motor to reverse, and the peristaltic pump is driven to reverse through the gear rod. The aspirated blood sample is returned to the original sample tube, and the precipitated blood cells and plasma can be fully mixed through several times of suction and spitting.
Why to choose peristaltic pump
1. High cleanliness: due to the working principle of the peristaltic pump itself, the fluid will only contact the peristaltic pump hose, effectively avoiding a series of pollution caused by contacting the pump body. The peristaltic pump pipes meet the GMP, USP Class VI, FDA, NSF and other clean certification standards. They do not contain various toxic and harmful substances, and are very suitable for use in medical instruments.
2. High precision: the volume pumped by the peristaltic pump is constant every revolution, so the peristaltic pump is also called constant flow pump. The peristaltic pump can easily adjust and calibrate the flow freely by changing the pump speed under the condition of constant flow and high accuracy. The peristaltic pump has high repetition accuracy, strong stability when delivering blood, and can also adjust the flow according to the specific use.
3. It has the advantage of low maintenance cost: the peristaltic pump has no such valves and seals, and its structure is very simple and reliable. In addition to replacing the pump pipe, there is no other place that requires special maintenance. It is very simple to replace the pump pipe, which can be completed in only one minute. It can effectively save the maintenance cost of blood viscosity analyzer.
4. Low shear force: it is a high-quality choice for conveying shear sensitive fluid, which is very suitable for conveying blood samples without damaging their biological properties.